Python Programming - Debugging Questions with Answers focus on identifying and fixing code errors. These Python Debugging Questions are useful for IBM, Wipro, and SSC exams to enhance logical reasoning and problem-solving in programming
Debugging
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11. What is the purpose of the "finally" block in exception handling?
Handle specific exceptions Execute only if no exception Execute always for cleanup Handle syntax errors
Answer: Option
C
Hints: The finally block always executes, regardless of whether an exception occurred or not, making it ideal for cleanup operations.
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12. Which pdb command prints the current stack trace?
Answer: Option
C
Hints: The "w" command in pdb displays the stack trace, showing the current execution point and call hierarchy.
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13. What causes "UnboundLocalError: local variable referenced before assignment"?
Global variable access Variable accessed before assignment Variable name conflict Memory allocation issue
Answer: Option
B
Hints: This error occurs when a local variable is accessed before it's assigned a value within the function.
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14. How can you inspect variable values in pdb?
Answer: Option
C
Hints: The "p" command in pdb is used to print and inspect variable values during debugging sessions.
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15. What is a common debugging technique for isolating issues?
Binary search debugging Linear scanning Random testing Code obfuscation
Answer: Option
A
Hints: Binary search debugging involves systematically dividing the code to locate the source of an error.
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16. Which exception is raised when a key is not found in a dictionary?
KeyError IndexError ValueError NameError
Answer: Option
A
Hints: KeyError is specifically raised when trying to access a dictionary key that doesn't exist.
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17. What does the "l" command do in pdb?
List variables List source code Load module Leave debugger
Answer: Option
B
Hints: The "l" command in pdb lists the source code around the current line being executed.
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18. What is the purpose of the "assert" statement in debugging?
Handle exceptions Check conditions for debugging Print debug information Skip code execution
Answer: Option
B
Hints: assert statements are used for debugging by checking if conditions are true, raising AssertionError if false.
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19. Which pdb command steps over function calls?
Answer: Option
B
Hints: The "n" command in pdb steps over function calls, executing them without stepping into their code.
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20. What is "rubber duck debugging"?
Using physical tools Explaining code to find errors Testing with random data Debugging hardware issues
Answer: Option
B
Hints: Rubber duck debugging involves explaining code line-by-line to an inanimate object to find logical errors.
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